The ergonomic posture support cushion from Drive Medical provides firm yet plush support to reduce discomfort in the head neck shoulders and back by promoting ideal spinal alignment. The cushion is great for use at home in the office or even on the road in the car. Plus it also works great placed behind the knees and ankles. The cushion comes compressed in a unique compact package and expands to full size when opened. The cushion's cover is also removable and machine-washable for easy care while a handy elastic strap keeps the cushion securely in place.